Empirical likelihood and Wilks phenomenon for data with nonignorable missing values
Puying Zhao,
Lei Wang and
Jun Shao
Scandinavian Journal of Statistics, 2019, vol. 46, issue 4, 1003-1024
Abstract:
Wilks's theorem is useful for constructing confidence regions. When applying the popular empirical likelihood to data with nonignorable nonresponses, Wilks's phenomenon does not hold. This paper unveils that this is caused by the extra estimation of the nuisance parameter in the nonignorable nonresponse propensity. Motivated by this result, we propose an adjusted empirical likelihood for which Wilks's theorem holds. Asymptotic results are presented and supplemented by simulation results for finite sample performance of the point estimators and confidence regions. An analysis of a data set is included for illustration.
Date: 2019
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https://doi.org/10.1111/sjos.12379
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Persistent link: https://EconPapers.repec.org/RePEc:bla:scjsta:v:46:y:2019:i:4:p:1003-1024
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